package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("保存菜品信息，参数：{}", dishDTO);
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        // 保存菜品信息
        dishMapper.insert(dish);

        // 保存口味信息
        Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(id);
            }
        }
        dishFlavorMapper.insertBatch(flavors);
    }

    /**
     * 分页查询菜品
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {

        // 分页查询菜品数据
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> dishes = dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(dishes.getTotal(), dishes.getResult());
    }

    /**
     * 批量删除菜品
     *
     * @param ids
     */
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //遍历菜品中是否有包含启售的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getDishById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品处于启售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //如果菜品不是启售中，检查是否关联套餐
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
    }
    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getById(Long id) {
        Dish dish = dishMapper.getDishById(id);
        List<DishFlavor> dishFlavorByDishId = dishFlavorMapper.getDishFlavorByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavorByDishId);
        return dishVO;
    }
    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品基本信息
        dishMapper.update(dish);
        //修改口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /**
     * 启用停用菜品
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status,id);
    }
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        List<Dish> list = dishMapper.list(dish);
        return list;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {

        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVoList = new ArrayList<>();
        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);
            //根据菜品id查询对应的口味
            List<DishFlavor> dishFlavorByDishId = dishFlavorMapper.getDishFlavorByDishId(d.getId());
            dishVO.setFlavors(dishFlavorByDishId);
            dishVoList.add(dishVO);
        }
        return dishVoList;
    }
}
